Revenue, Deferred Revenue and Deferred Costs and Other - Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Change in Contract with Customer, Liability [Abstract]
Beginning balance as of January 1, 2019	$ 2,051
Amounts billed but unrecognized	7,208
Revenue recognized	(6,067)
Assumed from business combination	1,407
Ending balance as of December 31, 2019	4,599
Deferred revenue, current		$ 3,945	$ 1,614
Deferred revenue, noncurrent		654	437
Total deferred revenue	$ 4,599	$ 4,599	$ 2,051